Valve-grinding machine.



T. v. CUDMURE. l yVALVE GRINDING MACHINE.

APfLlCATION FILED APR. 30. |911.

Patented Jan. 8,1918.

l 74! Il THUMAS V CUD T. V. CUDMORE.

VALVE GHINDING MACHINE.

APPUCMIDN man Hman; x91?.

Pateil'dy Jan. 8, 1913.`

2 SHEETS-SHEET 2.-

FIG ""6.

@www mM 4 Nw f5A Vv. M W we ATTORNE Ys;

portion of a gas engine.

device to this engine I have illustratedV an' Y engine of the Ford type, as the machine is PATENT OFFICE.

ITHOMAS V. CUDMOBE, OF AUSTIN', MINNESOTA.

VALVE-GBINDING MACHINE.

Specification of Letters Patent. I

`Application med April so, 1er?. serial No. 165,125.

To all whom it may concern:

Be it known that I, THOMAS V. CUDMORE, a citizenl of the United States, residentl of Austin, county of Mower, 'State of -Minne- Sota, have invented certain `new and useful Improvements in Valve-Grindin Machines, of which the following is a specicatioh.

My invention relates 4to machinesV for grinding the valves of a gas engine and par-v ticularly those of the Ford type, and the object of the invention 'is to provide a device by means of which all the valves can be easily and quickly ground. Generally it takes hours to properly grind the valves of an engine, but with my apparatus the same operation can be performed in a fewvlninutes.

` A further object is to provide a grinding machine of comparatively simple construction 'and onewhich can be easily and quickly mounted on the cylinders.

p The invention consists generally in vaiiousl constructions and combinations, all as hereinafter described and particularly point- A edoutin the claims.,

In the accompanying drawings forming part of this specification,

'Figure 1 is a side elevation, partially inv section, of the upperportion of .a cylinder with my invention applied thereto,

F ig.A 2 is an end elevation of the same, showing the device in its working position,

Fig. 3 4is a detail sectional view, showing the manner of connecting the grinding device With the valve,

Fig. 4 is a sectional view on the line 0f Flg. 1,' j

Fig. 5 isa sectional view on the line 5-'-5 ofFlg. 4, i

Fi 6 is-a vertical sectional view, show-` ing t e machine mounted on the'cylinder but inits non-working position. V

In thedrawing, 2 represents the upper In applying my particularly adapted for an engine of that ind,although it may be used for the same purpose on other `gas engines. The cylinder head of the engine is rst removed and in lace thereof I mount my machine, a cent-ral lock 3 and. end blocks 4 and@y being pro'- vided and seated on the enginevin placeof the cylinder head and secured in the same lwhich a second shaft 12 is journaled.

manner as the cylinder head', as indicated by dotted lines in Fig. 2. Thus no special clamps or securing means arenccessary for my attachment, the fastening bolts or screws entering the sockets in the cylinder that are provided for the-bolts of the cylinder head. The blocks 3,` el and 5 haie bearingsv for a shaft G held against longitudinal movement by suitablel means, such as Cotter pins A guide 8 is mounted on theblock 3 and a bracket 9 has an arm 10 journaled on the shaft G and provided with a bearing 11 in The bracket 9 is free to rock onthe shaft 6 as a center, and i'n the lower portion of said bracketis a pin 13 adapted to fit into sockets 14 in the guide S'and yieldingly held toward said sockets by= the tension of a spring 15. rThis pinhas a beveled surface 16. A plunger 17 ismounted to slide in said bracket and is normally held in its raised position b v the tension of a spring 18. A finger grip 19 is 'provided onthe plunger and when it is depressed the pin 13 will be withdrawn Patented Jan. 8,1918.

from its socket in the guide to allow the bracket .and the shaft 1 2 to be swung from one end of theV guide 8 to the other. or from the position shownin Fig. i to that illustrated in F ig. 6, or vice versa.-

This bracket9 and the guide are -preferably located4 about midway between the ends of the shafts and12, where the apparatusc'an be conveniently tilted from side to side. The 4shaft 1 2` is provided with an operating crank 20 and secured on the shaft at intervals are a series of beveled gears 21 held in place by set 4screws 22 or other suitable means. Adjacent to each of these gears' the shaft -12 is provided with transverse notches 23 which are progressively arranged around the circumference of the shaft. A series of brackets"24 are secured at- :25 on the shaft 6 and have bearings on the shaft 12 and in these brackets sockets 2G are formed, Beveled pinions 27 fit within these recesses 28 in the brackets 24 and are splinwi on studs 29 which have a limited intweraerf Vin said pinions by, means of set screws ff compression"springs 33 are interposed he tween these caps and the upper ends of the studs 29 for holding said studs in' a de pressed position'with a yielding, pressure,v

' with a lug -38 to'enter the inthe upperysurface of e these sockets 'being formedi inthe valvesIv When-they 'are-l turned out' at .the iactOry. The valve 'stein'fil h asa. spring which nonv .mallyhold's'the valve in vits closed position, fand resists'opening the same through the movement of the .crank shaft. Preparatory to'grinding the valves, I .re-

the caps|32 being positioned to enter 'the' notches inthe shaft 'l2' and allow the studs 29,130 move upwardly W,ith, eacl1 'revolution of the shaft.

The lowelr ends thestuds halve iso'ck- .ets .34- and 'jaw plates 3.5 fit looselywi'thin thesesoc'kets and are held therein vlby n'ieans .'f slots 36 and pins 37 whiehgpermit 'a' longitudinal. ,and rocking movement of "the plate is provided V holes 39' provided pla-tes', Each end'of the' c h valve disk' 40.,

move them and place-"the springs on-` the stems just beneath the disks, where their tension will be exerted to hold the' valves an open4 position, as indicated in i"'ig..,1.

' In using the' device, the blocks' are fir'st secured to the. engine in place of the c ylindeit' headandthef shaftlQ swung'to' its working` P.StiOn as indicated in- Fig. 4.

adjuste studs '29 'vv'ill be above.. the '3'0 valves,.one'foi each valve, and t- ,"jaw plates' n willfenten the holes 'in the vai-ve' disk The operator Willthen. vgrasp'the crankQO and turn. the 'shaft 1:2. Mln sodoing thecaps '32'. Will-follow the snrfac'e'- ofthe sha it" 12 and with each revolution of the shaft will drop ini'oitl'ie notches '23 'and allowthe valve' connected with that particular-studtwhiehis v allowed 'to .raise..to be lifted oii its .seat by i the tension of the spring 42,.'while continu,

which theupper spring bears en't'ers;- the ving to rotate through the' gear' 21 Iand' pinion '27, A's soon' as the cap'32 passes out of ,they 1 notch in the 'shaftV 12,',the stud y29"Will again be depressedfand-force th'exval've disk-'downl upon' its seat and upon the oil-and' eineryy mixture usually Ver'hployed ior' re-grinding a .'yialve of this 'kindn The notches 23 are 'diii'erentlypositioned in their 'shafttoalloWthe valves to raise Iv'altei'liately or in rotation, in' substantially f the same'. manner as'they Would-'be raised by the operation'of .the ca1'n's'haft'. In thisv way I am able to affect the' opening and closing of the valves and;r thershifting of their position onfthe seats Without the neces sity of removing the'canl shaft, although 1t r may be taken out' of the' engine, if preferred.

' stance getting betweenthe valve andthe 'seat vand cuttingHa groove ,1n theseat 0r 1n Whenever.l a 'valve disk is .raisedfand .a stud. depressed, its position on its'seat .will be changed slightly, dus to its' continued rotarA tio-nv- Thfe' will never be. any-possibilit?, therefore, Oi grit or anyhard .f olgn su the Furthermore, the' Z1 2 `vmay When' so i Q means for mounting 1t 'on an engine combe operated* in both directions so that'the rotary' movement of,. the"v alves in grii-iding. l

may. be.revei'sedi..whenever desired and. the

loosely mountedja'w plates' will rock 'and'.

slide from'side .to side' and' accomm dalte; r themselves 4to the positio'li save a great'dealof time and labor ordi'- narily required to grin --valves of this type'.y

The' shaft.,121is pref rablygearedtothe valves s 'tliatf it n'iakes one revolution' tothree .of the, v alve,though, of'course, this'.

spee d 'may be varied if desired'- n'theconf Zstruct'ionshowm the valves Will-'raise and lower wlth everythird revolutibnand'one turri 'of the handle will rotate' the valves.

'in their grinding position andohce in 'their raised position." When the CainV shaft is removed Vin case of general 'over-4 hauling of 'the'engi'ne, all of the valves may be' ground atthe saine time, but when the. camshaft is v1n place', there willalways be' two'val'v'es held in their open posi 'ion by` crank-fa 'few moments-the. engine is. givenl a,

half'turnand this will close the two-valves which Ihave--l'ieenheld.' open and -open two 5 W ill be positioned so, that-'the lugs there others, and then the operation is 'repeated the work continued on the-others. ltmakes very` little. "difference in the time required notchin: the uppershaft there, will be suiiicient clearance forthe upper. spring to allow the lower one to open the valve. These notches are s o positioned vthat the valves open i'n' rotation, one'atfaftiine., end .th'e grinding lscont-inued. until all of them are perfectly'seated.l

I claini as my invention.: 1'.- A valve 'grinding mechanism having means for mounting-:leon anengin'e coinprising a shaft, suitable supportstherefor,

studs geared to said shaft and having means on' one end thereof for engagement with thel 1 cylinder valves, said'shaft havin means ce! operatingwith the other end o said studs l'they shaft; In- `thisgcase sii; valves W-ill be. ground at once 4and after' operating the 'until Iall the valveshave-beenground. VBy; '.-t-iltingftlie machine to one side, the valves may beexarninednind those, 'which may bef "properlyr` ground first may 'be' removed "and Whereb 'said valves may'T beallowe'd to rise' when t e'ends of their respective operating studs are opposite predetermined points on said shaft, whereby sa'id valves Vvwill be openedand closed insuccession during their .revolvingjmovemenn andvmeans for revolv-v ing saidshafn Ajvalve Agrindin mechanism having prsing a shaft havingnotches progressively arranged in its surface,4 suitable supports for Said shaft, studs gearedto said shaft and having mea-ns on one end thereof 'for enduring their revolving movement, and means for revolving said shaft.

3. V.A valve grinding mechanism comprising a shaft having means for supporting vit von afn engine, studs .geared to said shaft to be revolved-thereby, jaw plates loosely iiiounte'd' in said studs and having lugs for engaging the' holes in the valve `disk for revolving the saine with said studs, said studs being inounti ed to yield vertically at'intervals and allow said valves to `open intermittently, said loosely mounted jaivl plates having longitu'- I `din'al Vslots therein to receive pins'in said' studs for accommodating themselves 'to theosition .of the valves and meansifor revolvi ing said shaft.

LA valve grinding mechanism comprising blocks having means for securing them 730 on an engine in. place of the -cylinder head, a shaft centrally mounted on said blocks,

' arms mounted on said shaftffor oscillation from one side to theotherrotsaid cylinder@ af shaft carried by said arms and having an operating means7 studs geared to said shaft and having means for, engaging the cylinder valves for 'rotating tlienr on their seats,v a

.bracket carried by vone ofgsaid arms and a locking device mounted'in said bracket and provided with a handle and having' means or engaging said. guidefor locking said stud-carrying shaftI in its Working position above 4said valves or tsinactiveposition at.

one side of said valves. 4

5. A valve grinding mechanism compris ing a shaft havii'ig'ineans for supportingi-t .i

. on an engine-5 said shalt't having notches ro.

gressively arranged in its "surface, brac iets mounted on Vsaid shaft and having sockets tlicrein, studs fitting within s aid'sockets and springs interposed between said .studs and said shaft. pinions geared .tosaid 'shaftand wherein' said Vstuds are slidably mounted` said sthds having' meansVfor engagementv with the valve disks and the notches in said 'shaft allow-ing vertical 'iiioyemeiit of said Y studs as said shaft revolves.`

6.' A valve grinding mechanism comprising a. shaft having means for 'mount'ig it on" an engine, studs having means` for connection with the cylinder valves andgeared to sai'd'sliai't, said studs being niountedto yield vertically -ivi'th said valves,'and said shaft.

having notches, progressively arranged therein for intermittently,alloiving the rais# `v olvi`ng,moi "'e'ment and 'means for operatingl saidfshafn@ 7.' A valve grinding. mechanism comprisying of-,saidvalves and studs during their reing blocks -having means for securing them to air-engine, brackets connected- With said.

"blocks and projecting upwardly therefrom,V a shaft mounted in said'brackets for os. lcillation 4therevvth from one side to the 4other of theengine, said/brackets hav- 9' .ing sockets therein,- studs slidable in said,` I

sockets', springs for yieldingly holding said;A

studs ina projected posi-tion, pinons eared.' `J[o said .shaft and .whereinvsaid stu s are guideinounted o i'i one'of said blocks, a

mounted lto revolve therewith` and move lengthwise independently thereoL- l'and 't valveenga'gng means carried b said st ud's'..

In Witnessy .u-'he'r'eo I have iny hand' this 21st day of'A'pril 1917.

'THOMAS v. :cUDMoR'Ef/ ereunto set soi 

